An accelerated direct demodulation method for image reconstruction using spherical data from the hard X-ray modulation telescope

作     者：Zhuo-Xi Huo Jian-Feng Zhou 

作者机构：Department of Engineering Physics and Center for Astrophysics Tsinghua University Key Laboratory of Particle & Radiation Imaging (Tsinghua University) Ministry of Education Key Laboratory of High Energy Radiation Imaging Fundamental Science for National Defense 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2013年第13卷第8期

页      面：991-1012页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11173038 and 11103022) the Tsinghua University Initiative Scientific Research Program (Grant No. 20111081102) 

主　　题：methods data analysis methods numerical techniques image processing instrumentation high angular resolution 

摘      要：The hard X-ray modulation telescope （HXMT） mission is mainly devoted to performing an all-sky survey at 1- 250 keV with both high sensitivity and high spatial resolution. The observed data reduction as well as the image reconstruction for HXMT can be achieved by using the direct demodulation method （DDM）. However the original DDM is too computationally expensive for multi-dimensional data with high resolution to be employed for HXMT data. We propose an accelerated direct demodulation method especially adapted for data from HXMT. Simulations are also presented to demonstrate this method.